James Rackover taunted cops during the collection of surveillance footage.

The suspect in a brutal and bizarre murder of a Hofstra grad laughed in the face of detectives, telling them his associates were “none of your f---ing business, ” a cop testified Monday.

The new details about James Rackover’s arrogance as police searched for the body of Joseph Comunale emerged during a hearing in Manhattan Supreme Court regarding evidence in the case.

Rackover, 26, and Lawrence Dilione, 28, both face murder charges for killing Comunale in a posh Upper East Side apartment after a wild night of partying.

In the initial stages of the investigation, police had found bloody towels and Comunale’s driver’s license in trash at the building. Surveillance video showed Rackover leaving the building with three duffle bags and a backpack, which he threw into the trunk of his black Mercedes.